Hello. [Kernel 2.6 and thinkpad-source problem] I have got the same problem on a Thinkpad T21. Here you can find a patch and a debian package for thinkpad-source.I am not sure if these bug is already fix in the newest version of thinkpad-source.
http://www.student.informatik.tu-darmstadt.de:8080/~zeimetz/R40-Debian/debian/thinkpad/ HTH Stefan Schmidt